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Sexual fluidity

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Sexual fluidity is one or more changes in sexuality or sexual identity (sometimes known as sexual orientation identity). Sexual orientation is stable for the vast majority of people, but some research indicates that some people may experience change in their sexual orientation, and this is slightly more likely for women than for men.[1] There is no scientific evidence that sexual orientation can be changed through psychotherapy.[2][3] Sexual identity can change throughout an individual's life, and does not have to align with biological sex, sexual behavior, or actual sexual orientation.[4][5][6]

According to scientific consensus, sexual orientation is not a choice.[7][8][9] There is no consensus on the exact cause of developing a sexual orientation, but genetic, hormonal, social, and cultural influences have been examined.[9][10] Scientists believe that it is caused by a complex interplay of genetic, hormonal, and environmental influences.[7][9] Although no single theory on the cause of sexual orientation has yet gained widespread support, scientists favor biologically-based theories.[7][11] Research over several decades has demonstrated that sexual orientation can be at any point along a continuum, from exclusive attraction to the opposite sex to exclusive attraction to the same sex.[12]

The results of a large-scale, longitudinal study by Savin-Williams, Joyner, and Rieger (2012) indicated that stability of sexual orientation identity over a six-year period was more common than change, and that stability was greatest among men and those identifying as heterosexual.[13] While stability is more common than change, change in sexual orientation identity does occur and the vast majority of research indicates that female sexuality is more fluid than male sexuality. This could be attributed to females' higher erotic plasticity or to sociocultural factors that socialize women to be more open to change.[14] Due to the gender differences in the stability of sexual orientation identity, male and female sexuality may not function via the same mechanisms. Researchers continue to analyze sexual fluidity to better determine its relationship to sexual orientation subgroups (i.e., bisexual, lesbian, gay, etc.).

Use of the term sexual fluidity has been attributed to Lisa M. Diamond.[15][16] The term and the concept gained recognition in the psychological profession[citation needed] and in the media.[17]

Background

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Often, sexual orientation and sexual identity are not distinguished, which can impact accurately assessing sexual identity and whether or not sexual orientation is able to change; sexual orientation identity can change throughout an individual's life, and may or may not align with biological sex, sexual behavior or actual sexual orientation.[4][5][6] While the Centre for Addiction and Mental Health and American Psychiatric Association state that sexual orientation is innate, continuous or fixed throughout their lives for some people, but is fluid or changes over time for others,[18][19] the American Psychological Association distinguishes between sexual orientation (an innate attraction) and sexual orientation identity (which may change at any point in a person's life).[20] Scientists and mental health professionals generally do not believe that sexual orientation is a choice.[7][8]

The American Psychological Association states that "sexual orientation is not a choice that can be changed at will, and that sexual orientation is most likely the result of a complex interaction of environmental, cognitive and biological factors...is shaped at an early age...[and evidence suggests] biological, including genetic or inborn hormonal factors, play a significant role in a person's sexuality."[9] They say that "sexual orientation identity—not sexual orientation—appears to change via psychotherapy, support groups, and life events."[20] The American Psychiatric Association says individuals may "become aware at different points in their lives that they are heterosexual, gay, lesbian, or bisexual" and "opposes any psychiatric treatment, such as 'reparative' or 'conversion' therapy, which is based upon the assumption that homosexuality per se is a mental disorder, or based upon a prior assumption that the patient should change his/her homosexual orientation". They do, however, encourage gay affirmative psychotherapy.[19]

In the first decade of the 2000s, psychologist Lisa M. Diamond studied 80 non-heterosexual women over several years. She found that in this group, changes in sexual identity were common, although they were typically between adjacent identity categories (such as 'lesbian' and 'bisexual'). Some change in self-reported sexual feeling occurred among many of the women, but it was small, only averaging about 1 point on the Kinsey scale on average. The range of these women's potential attractions was limited by their sexual orientations, but sexual fluidity permitted movement within that range.[11]: 56 

In her book Sexual Fluidity, which was awarded with the 2009 Lesbian, Gay, Bisexual, and Transgender Issues Distinguished Book Award by Division 44 of the American Psychological Association, Diamond speaks of female sexuality and trying to go beyond the language of "phases" and "denial", arguing that traditional labels for sexual desire are inadequate. For some of 100 non-heterosexual women she followed in her study over a period of 10 years, the word bisexual did not truly express the versatile nature of their sexuality. Diamond calls "for an expanded understanding of same-sex sexuality."[21]

Diamond, when reviewing research on lesbian and bisexual women's sexual identities, stated that studies find "change and fluidity in same-sex sexuality that contradict conventional models of sexual orientation as a fixed and uniformly early-developing trait."[22] She suggested that sexual orientation is a phenomenon more connected with female non-heterosexual sexuality, stating, "whereas sexual orientation in men appears to operate as a stable erotic 'compass' reliably channeling sexual arousal and motivation toward one gender or the other, sexual orientation in women does not appear to function in this fashion... As a result of these phenomena, women's same-sex sexuality expresses itself differently from men's same-sex sexuality at every stage of the life course."[23]

Biology and stability

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Conversion therapy (attempts to change sexual orientation) is rarely successful. In Maccio's (2011) review of sexual reorientation therapy attempts, she lists two studies that claim to have successfully converted gay men and lesbians to heterosexuals and four that demonstrate the contrary. She sought to settle the debate using a sample that was not recruited from religious organizations. The study consisted of 37 former conversion therapy participants (62.2% were male) from various cultural and religious backgrounds who currently or previously identified as lesbian, gay, or bisexual. The results indicated that there were no statistically significant shifts in sexual orientation from pre- to post-treatment. In follow-up sessions, the few changes in sexual orientation that did occur following therapy did not last. This study stands as support for the biological origin of sexual orientation, but the largely male sample population confounds the findings.[24]

Further support for the biological origin of sexual orientation is that gender atypical behavior in childhood (e.g., a young boy playing with dolls) appears to predict homosexuality in adulthood (see childhood gender nonconformity). A longitudinal study by Drummond et al. (2008) looked at young girls with gender dysphoria (a significant example of gender atypical behavior) and found that the majority of these girls grew up to identify as bisexual or lesbian.[25] Many retrospective studies looking at childhood behavior are criticized for potential memory errors;[26] so a study by Rieger, Linsenmeier, Gygax, & Bailey (2008) used home videos to investigate the relationship between childhood behaviors and adult sexual orientation. The results of this study support biological causation, but an understanding of how cultural assumptions about sexuality can affect sexual identity formation is also considered.[27]

There is strong evidence for a relationship between fraternal birth order and male sexual orientation, and there has been biological research done to investigate potential biological determinants of sexual orientation in men and women. One theory is the second to fourth finger ratio (2D:4D) theory. Some studies have discovered that heterosexual women had higher 2D:4D ratios than did lesbian women but the difference was not found between heterosexual and gay men.[28] Similarly, a study has shown that homosexual men have a sexually dimorphic nucleus in the anterior hypothalamus that is the size of females'.[29] Twin and family studies have also found a genetic influence.[11]

Changes in sexuality

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Demographics

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General

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One study by Steven E. Mock and Richard P. Eibach from 2011 shows 2% of 2,560 adult participants included in National Survey of Midlife Development in the United States reported change of sexual orientation identities after a 10-year period: 0.78% of male and 1.36% of female persons that identified themselves to be heterosexuals at the beginning of the 10-year period, as well as 63.6% of lesbians, 64.7% of bisexual females, 9.52% of gay males, and 47% of bisexual males. According to the study, "this pattern was consistent with the hypothesis that heterosexuality is a more stable sexual orientation identity, perhaps because of its normative status. However, male homosexual identity, although less stable than heterosexual identity, was relatively stable compared to the other sexual minority identities". Having only adults included in the examined group, they did not find the differences in fluidity which were affected by age of the participants. However, they stated that "research on attitude stability and change suggests most change occurs in adolescence and young adulthood (Alwin & Krosnick, 1991; Krosnick & Alwin, 1989), which could explain the diminished impact of age after that point".[30]

Males versus females

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Research generally indicates that while the vast majority of men and women are stable and unchanging in their orientation and identity; when it comes to those who are fluid, female sexuality is more fluid than male sexuality.[31] In a seminal review of the sexual orientation literature, stimulated by the findings that the 1970s sexual revolution affected female sexuality more so than male sexuality, research by Baumeister et al. indicated that when compared to males, females have lower concordance between sexual attitudes and behaviors, and sociocultural factors affect female sexuality to a greater degree; it also found that personal change in sexuality is more common for females compared to males.[14] Female sexuality (lesbian and heterosexual) changes significantly more than males on both dimensional and categorical measures of sexual orientation.[32] Furthermore, the majority of homosexual women who previously identified as a different sexual orientation identified as heterosexual; whereas for males, the majority previously identified as bisexual, which the authors believe support the idea of greater fluidity in female sexuality.[32] Females also report having identified with more than one sexual orientation, more often than males and are found to have higher levels of sexual orientation mobility. Females also report being bisexual or unsure of their sexuality more often than males, who more commonly report being exclusively gay or heterosexual.[33] Over a six-year period, women have also been found to display more shifts in sexual orientation identity and were more likely to define their sexual orientation with non-exclusive terms.[13]

The social constructivist view suggests that sexual desire is a product of cultural and psychosocial processes[34] and that men and women are socialized differently. This difference in socialization can explain differences in sexual desire and stability of sexual orientation. Male sexuality is centered around physical factors, whereas female sexuality is centered around sociocultural factors,[14] making female sexuality inherently more open to change. The greater effect on female sexuality in 1970s sexual revolution shows that female shifts in sexual orientation identity may be due to greater exposure to moderating factors (such as the media).[35] In western culture, women are also expected to be more emotionally expressive and intimate towards both males and females. This socialization is a plausible cause of greater female sexual fluidity.[36] Whether female sexuality is naturally more fluid and therefore changes from social factors or social factors cause female sexuality to be less stable is unknown.

An evolutionary psychology hypothesis proposes that bisexuality enables women to reduce conflict with other women, by promoting each others' mothering contributions, thus ensuring their reproductive success. According to this view, women are capable of forming romantic bonds with both sexes and sexual fluidity may be explained as a reproductive strategy that ensures the survival of offspring.[37]

A longitudinal study concluded that stability of sexual orientation was more common than change.[13] Gender differences in the stability of sexual orientation may vary by subgroup and could possibly be related to individual differences more than gender-wide characteristics.[33]

Youth (age 14–21)

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One study that did compare the stability of youth sexual orientation identity across genders found results opposite to most done with adult samples. The study compared non-heterosexual male and female sexual orientation over a year and concluded that female youth were more likely to report consistent sexual identities than males.[38] The study was conducted over a single year.

Youth appears to be when most change in sexual orientation identity occurs for females. A 10-year study compared sexual orientation as measured at four times during the study. The most change was found between the first (taken at 18 years of age) and second (taken at 20 years of age) measurements which was the only time bracket that fell during adolescence.[39]

A population-based study conducted over 6 years found that nonheterosexual (gay/lesbian/bisexual) male and female participants were more likely to change sexual orientation identity than heterosexual participants.[40] A yearlong study found that sexual identity was more stable for gay and lesbian youth participants when compared to bisexual participants.[38]

The identity integration process that individuals go through during adolescence appears to be associated with changes in sexual identity; adolescents who score higher on identity integration measures are more consistent in their sexual orientation. Bisexual youths seem to take longer to form their sexual identities than do consistently homosexual or heterosexual identifying youths[38] so bisexuality may be seen as a transitional phase during adolescence. Rosario et al. (2006) conclude that "acceptance, commitment, and integration of a gay/lesbian identity is an ongoing developmental process that, for many youths, may extend through adolescence and beyond."[38]

Sabra L. Katz-Wise and Janet S. Hide report in article published 2014 in "Archives of Sexual Behavior" of their study on 188 female and male young adults in the United States with a same-gender orientation, aged 18–26 years. In that cohort, sexual fluidity in attractions was reported by 63% of females and 50% of males, with 48% of those females and 34% of those males reporting fluidity in sexual orientation identity.[41]

Bisexuality as a transitional phase

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Bisexuality as a transitional phase on the way to identifying as exclusively lesbian or gay has also been studied. In a large-scale, longitudinal study, participants who identified as bisexual at one point in time were especially likely to change sexual orientation identity throughout the six-year study.[13] A second longitudinal study found conflicting results. If bisexuality is a transitional phase, as people grow older the number identifying as bisexual should decline. Over the 10-year span of this study (using a female-only sample), the overall number of individuals identifying as bisexual remained relatively constant (hovering between 50 and 60%), suggesting that bisexuality is a third orientation, distinct from homosexuality and heterosexuality and can be stable.[39] A third longitudinal study by Kinnish, Strassberg, and Turner (2005) supports this theory. While sex differences in sexual orientation stability were found for heterosexuals and gays/lesbians, no sex difference was found for bisexual men and women.[32]

Bisexuality remains "undertheorized and underinvestigated".[42]

Cultural debate

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The exploration on sexual fluidity initiated by Lisa M. Diamond presented a cultural challenge to the LGBT community; this is because although researchers usually emphasize that changes in sexual orientation are unlikely, despite conversion therapy attempts, sexual identity can change over time. That sexual orientation is not always stable challenges the views of many within the LGBT community, who believe that sexual orientation is fixed and immutable.[43]

There is some level of cultural debate regarding the question of how (and if) fluidity exists among men,[44] including questions regarding fluctuations in attractions and arousal in male bisexuals.[45]

Sexual fluidity may overlap with the label abrosexual, which has been used to refer to regular changes in one's sexuality.[46][47]

See also

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References

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  1. ^ *Bailey, J. Michael; Vasey, Paul; Diamond, Lisa; Breedlove, S. Marc; Vilain, Eric; Epprecht, Marc (2016). "Sexual Orientation, Controversy, and Science". Psychological Science in the Public Interest. 17 (2): 45–101. doi:10.1177/1529100616637616. PMID 27113562. Archived from the original on 2019-12-28. Retrieved 2019-06-28. Sexual fluidity is situation-dependent flexibility in a person's sexual responsiveness, which makes it possible for some individuals to experience desires for either men or women under certain circumstances regardless of their overall sexual orientation....We expect that in all cultures the vast majority of individuals are sexually predisposed exclusively to the other sex (i.e., heterosexual) and that only a minority of individuals are sexually predisposed (whether exclusively or non-exclusively) to the same sex.
    • Seth J. Schwartz; Koen Luyckx; Vivian L. Vignoles (2011). Handbook of Identity Theory and Research. Springer Science & Business Media. p. 652. ISBN 978-1441979889. Retrieved February 18, 2016. Modern scholarship examining the stability of sexual orientation also seems to support our conceptualizations of sexual orientation, sexual orientation identity, and sexual identity (e.g., Diamond, 2003a; Horowitz & Necomb, 2001; Rosario, Schrimshaw, Hunter, & Braun, 2006, see Savin-Williams, Chapter 28, this volume). Specifically, some dimensions of sexual identity, such as relationships, emotions, behaviors, values, group affiliation, and norms, appear to be relatively fluid; by contrast, sexual orientation [i.e., an individual's patterns of sexual, romantic, and affectional arousal and desire for other persons based on those persons' gender and sex characteristics (APA Task Force on Appropriate Therapeutic Responses to Sexual orientation, 2009)] has been suggested to be stable for a majority of people across the lifespan (Bell, Weinberg, & Hammersmith, 1981; Ellis & Ames, 1987; Haldeman, 1991; Money, 1987).
    • Dennis Coon; John O. Mitterer (2012). Introduction to Psychology: Gateways to Mind and Behavior with Concept Maps and Reviews. Cengage Learning. p. 372. ISBN 978-1111833633. Retrieved February 18, 2016. Sexual orientation is a deep part of personal identity and is usually quite stable. Starting with their earliest erotic feelings, most people remember being attracted to either the opposite sex or the same sex. [...] The fact that sexual orientation is usually quite stable doesn't rule out the possibility that for some people sexual behavior may change during the course of a lifetime.
    • American Psychological Association (2012). "Guidelines for Psychological Practice With Lesbian, Gay, and Bisexual Clients" (PDF). American Psychologist. 67 (1): 10–42. doi:10.1037/a0024659. PMID 21875169. Archived (PDF) from the original on June 16, 2019. Retrieved June 23, 2019. [S]ome research indicates that sexual orientation is fluid for some people; this may be especially true for women (e.g., Diamond, 2007; Golden, 1987; Peplau & Garnets, 2000). [...] Therapeutic efforts to change sexual orientation have increased and become more visible in recent years (Beckstead & Morrow, 2004). Therapeutic interventions intended to change, modify, or manage unwanted nonheterosexual orientations are referred to as "sexual orientation change efforts" (SOCE; APA, 2009b). [...] Reviews of the literature, spanning several decades, have consistently found that efforts to change sexual orientation were ineffective (APA, 2009b; Drescher, 2001; Haldeman, 1994; T. F. Murphy, 1992).
    • Eric Anderson; Mark McCormack (2016). "Measuring and Surveying Bisexuality". The Changing Dynamics of Bisexual Men's Lives. Springer Science & Business Media. p. 47. ISBN 978-3-319-29412-4. Retrieved June 22, 2019. [R]esearch suggests that women's sexual orientation is slightly more likely to change than men's (Baumeister 2000; Kinnish et al. 2005). The notion that sexual orientation can change over time is known as sexual fluidity. Even if sexual fluidity exists for some women, it does not mean that the majority of women will change sexual orientations as they age – rather, sexuality is stable over time for the majority of people.
  2. ^ American Psychological Association (2012). "Guidelines for Psychological Practice With Lesbian, Gay, and Bisexual Clients" (PDF). American Psychologist. 67 (1): 10–42. doi:10.1037/a0024659. PMID 21875169. Archived (PDF) from the original on June 16, 2019. Retrieved June 23, 2019. Therapeutic efforts to change sexual orientation have increased and become more visible in recent years (Beckstead & Morrow, 2004). Therapeutic interventions intended to change, modify, or manage unwanted nonheterosexual orientations are referred to as "sexual orientation change efforts" (SOCE; APA, 2009b). [...] Reviews of the literature, spanning several decades, have consistently found that efforts to change sexual orientation were ineffective (APA, 2009b; Drescher, 2001; Haldeman, 1994; T. F. Murphy, 1992).
  3. ^ "Royal College of Psychiatrists' Position Statement on Sexual Orientation" (PDF). Royal College of Psychiatrists. Archived (PDF) from the original on June 29, 2019. Retrieved June 21, 2019. The College believes strongly in evidence-based treatment. There is no sound scientific evidence that sexual orientation can be changed. Systematic reviews carried out by both the APA and Serovich et al suggest that studies which have shown conversion therapies to be successful are seriously methodologically flawed.
  4. ^ a b Sinclair, Karen, About Whoever: The Social Imprint on Identity and Orientation, NY, 2013 ISBN 9780981450513
  5. ^ a b Rosario, M.; Schrimshaw, E.; Hunter, J.; Braun, L. (2006). "Sexual identity development among lesbian, gay, and bisexual youths: Consistency and change over time". Journal of Sex Research. 43 (1): 46–58. doi:10.1080/00224490609552298. PMC 3215279. PMID 16817067.
  6. ^ a b Ross, Michael W.; Essien, E. James; Williams, Mark L.; Fernandez-Esquer, Maria Eugenia. (2003). "Concordance Between Sexual Behavior and Sexual Identity in Street Outreach Samples of Four Racial/Ethnic Groups". Sexually Transmitted Diseases. 30 (2). American Sexually Transmitted Diseases Association: 110–113. doi:10.1097/00007435-200302000-00003. PMID 12567166. S2CID 21881268.
  7. ^ a b c d Frankowski B.L.; American Academy of Pediatrics Committee on Adolescence (June 2004). "Sexual orientation and adolescents". Pediatrics. 113 (6): 1827–32. doi:10.1542/peds.113.6.1827. PMID 15173519. Archived from the original on 2013-03-20. Retrieved 2015-06-24. The mechanisms for the development of a particular sexual orientation remain unclear, but the current literature and most scholars in the field state that one's sexual orientation is not a choice; that is, individuals do not choose to be homosexual or heterosexual. A variety of theories about the influences on sexual orientation have been proposed. Sexual orientation probably is not determined by any one factor but by a combination of genetic, hormonal, and environmental influences.
  8. ^ a b Gloria Kersey-Matusiak (2012). Delivering Culturally Competent Nursing Care. Springer Publishing Company. p. 169. ISBN 978-0826193810. Retrieved February 10, 2016. Most health and mental health organizations do not view sexual orientation as a 'choice.'
  9. ^ a b c d Mary Ann Lamanna; Agnes Riedmann; Susan D Stewart (2014). Marriages, Families, and Relationships: Making Choices in a Diverse Society. Cengage Learning. p. 82. ISBN 978-1305176898. Retrieved February 11, 2016. The reason some individuals develop a gay sexual identity has not been definitively established  – nor do we yet understand the development of heterosexuality. The American Psychological Association (APA) takes the position that a variety of factors impact a person's sexuality. The most recent literature from the APA says that sexual orientation is not a choice that can be changed at will, and that sexual orientation is most likely the result of a complex interaction of environmental, cognitive and biological factors...is shaped at an early age...[and evidence suggests] biological, including genetic or inborn hormonal factors, play a significant role in a person's sexuality (American Psychological Association 2010).
  10. ^ "Answers to Your Questions For a Better Understanding of Sexual Orientation and Homosexuality". American Psychological Association. Archived from the original on January 20, 2019. Retrieved February 9, 2016.
  11. ^ a b c Bailey JM, Vasey PL, Diamond LM, Breedlove SM, Vilain E, Epprecht M (2016). "Sexual Orientation, Controversy, and Science". Psychological Science in the Public Interest. 17 (21): 45–101. doi:10.1177/1529100616637616. PMID 27113562.
  12. ^ "Sexual orientation, homosexuality and bisexuality". American Psychological Association. Archived from the original on August 8, 2013. Retrieved August 10, 2013.
  13. ^ a b c d Savin-Williams, R.C.; Joyner, K.; Rieger, G. (2012). "Prevalence and stability of self-reported sexual orientation identity during young adulthood". Archives of Sexual Behavior. 41 (1): 1–8. doi:10.1007/s10508-012-9913-y. PMID 22302504. S2CID 43225099.
  14. ^ a b c Baumeister, R.F. (2000). "Gender differences in erotic plasticity: the female sex drive as socially flexible and responsive". Psychological Bulletin. 126 (3): 347–374. doi:10.1037/0033-2909.126.3.347. PMID 10825779. S2CID 35777544.
  15. ^ Wayne Weiten; Dana S. Dunn; Elizabeth Yost Hammer (2016). Psychology Applied to Modern Life: Adjustment in the 21st Century. Cengage Learning. p. 341. ISBN 978-1337517072. Retrieved April 4, 2017.
  16. ^ Robert L. Crooks; Karla Baur (2016). Our Sexuality. Cengage Learning. p. 298. ISBN 978-1305887428. Retrieved April 4, 2017.
  17. ^ The pansexual revolution: how sexual fluidity became mainstream Archived 2021-01-28 at the Wayback Machine, Gaby Hinsliff, "The Guardian", Feb. 14, 2019, accessed May 20, 2021
  18. ^ "Question A2: Sexual orientation". Centre for Addiction and Mental Health. Archived from the original on 28 December 2014. Retrieved 3 February 2015.
  19. ^ a b "LGBT-Sexual Orientation: What is Sexual Orientation?" Archived 2014-06-28 at the Wayback Machine, the official web pages of APA. Accessed April 9, 2015
  20. ^ a b "Appropriate Therapeutic Responses to Sexual Orientation" (PDF). American Psychological Association. 2009. pp. 63, 86. Archived (PDF) from the original on June 3, 2013. Retrieved February 3, 2015.
  21. ^ Sexual Fluidity - Understanding Women's Love and Desire Archived 2019-10-13 at the Wayback Machine, Lisa M. Diamond 2009, Harvard University Press. Accessed April 6, 2015
  22. ^ Diamond, Lisa (2003). "Was it a phase? Young women's relinquishment of lesbian/bisexual identities over a five-year period". Journal of Personality and Social Psychology. 84 (2): 352–364. doi:10.1037/0022-3514.84.2.352. PMID 12585809.
  23. ^ Diamond, Lisa M. (2012). "The Desire Disorder in Research on Sexual Orientation in Women: Contributions of Dynamical Systems Theory" (PDF). Arch Sex Behav. 41 (1): 73–83. doi:10.1007/s10508-012-9909-7. PMID 22278028. S2CID 543731. Archived from the original (PDF) on 2012-05-18.
  24. ^ Maccio, E.M. (2011). Self-reported sexual orientation and identity before and after sexual reorientation therapy. Journal of Gay and Lesbian Mental Health, 15. 242-259.
  25. ^ Drummond, K.D.; Bradley, S.J.; Peterson-Badali, M.; Zucker, K.J. (2008). "A follow-up study of girls with gender identity disorder". Developmental Psychology. 44 (1): 34–45. doi:10.1037/0012-1649.44.1.34. PMID 18194003.
  26. ^ Rieger, G.; Linsenmeier, J.A.W.; Gygax, L.; Bailey, J.M. (2008). "Sexual orientation and childhood gender nonconformity: evidence from home videos". Developmental Psychology. 44 (1): 46–58. doi:10.1037/0012-1649.44.1.46. PMID 18194004. S2CID 41662483.
  27. ^ Hegarty, P.; et al. (2009). "Towards an LGBT-informed paradigm for children who break gender norms: comment on Drummond et al. (2008) and Rieger et al. (2008)" (PDF). Developmental Psychology. 45 (4): 895–900. doi:10.1037/a0016163. PMID 19586166.
  28. ^ Grimbos, T.; Zucker, K.J.; Dawood, K.; Burriss, R.P.; Puts, D.A. (2010). "Sexual orientation and the second to fourth finger length ratio: a meta-analysis in men and women". Behavioral Neuroscience. 124 (2): 278–287. doi:10.1037/a0018764. PMID 20364887. S2CID 2777884.
  29. ^ LeVay 1991 as cited in Miller, E.M. (2000). "Homosexuality, birth order, and evolution: toward an equilibrium reproductive economics of homosexuality". Archives of Sexual Behavior. 29 (1): 1–34. doi:10.1023/a:1001836320541. PMID 10763427. S2CID 28241162.
  30. ^ Mock, Steven E.; Eibach, Richard P. (2011). "Stability and Change in Sexual Orientation Identity Over a 10-Year Period in Adulthood" (PDF). Archives of Sexual Behavior. 41 (3): 641–648. doi:10.1007/s10508-011-9761-1. PMID 21584828. S2CID 15771368. Archived (PDF) from the original on 2020-06-29. Retrieved 2015-04-17.
  31. ^ Bailey, J. Michael; Vasey, Paul; Diamond, Lisa; Breedlove, S. Marc; Vilain, Eric; Epprecht, Marc (2016). "Sexual Orientation, Controversy, and Science". Psychological Science in the Public Interest. 17 (2): 45–101. doi:10.1177/1529100616637616. PMID 27113562. Archived from the original on 2019-12-28. Retrieved 2019-06-28.
  32. ^ a b c Kinnish, K.K.; Strassberg, D.S.; Turner, C.W. (2005). "Sex differences in the flexibility of sexual orientation: a multidimensional retrospective assessment". Archives of Sexual Behavior. 34 (2): 173–183. doi:10.1007/s10508-005-1795-9. PMID 15803251. S2CID 8545091.
  33. ^ a b Ott, M.Q.; Corliss, H.L.; Wypij, D.; Rosario, M.; Austin, S.B. (2011). "Stability and change in self-reported sexual orientation identity in young people: application of mobility metrics". Archives of Sexual Behavior. 40 (3): 519–532. doi:10.1007/s10508-010-9691-3. PMC 3081371. PMID 21125325.
  34. ^ Tolman, D.L.; Diamond, L.M. (2001). "Desegregating sexuality research: cultural and biological perspectives on gender and desire". Annual Review of Sex Research. 12: 33–74. PMID 12666736.
  35. ^ Diamond, 2008 as cited in Savin-Williams, R.C.; Joyner, K.; Rieger, G. (2012). "Prevalence and stability of self-reported sexual orientation identity during young adulthood". Archives of Sexual Behavior. 41 (1): 1–8. doi:10.1007/s10508-012-9913-y. PMID 22302504. S2CID 43225099.
  36. ^ Rust, P.C.R. (2000). "Bisexuality: a contemporary paradox for women". Journal of Social Issues. 56 (2): 205–221. doi:10.1111/0022-4537.00161.
  37. ^ Kuhle, B.X.; Radtke, S. (2013). "Born both ways: The alloparenting hypothesis for sexual fluidity in women". Evolutionary Psychology. 11 (2): 304–323. doi:10.1177/147470491301100202. PMC 10426844. PMID 23563096.
  38. ^ a b c d Rosario, M.; Schrimshaw, E.W.; Hunter, J.; Braun, L. (2006). "Sexual identity development among lesbian, gay and bisexual youth: consistency and change over time". The Journal of Sex Research. 43 (1): 46–58. doi:10.1080/00224490609552298. PMC 3215279. PMID 16817067.
  39. ^ a b Diamond, L.M. (2008). "Female bisexuality from adolescence to adulthood: results from a 10-year longitudinal study". Developmental Psychology. 44 (1): 5–14. doi:10.1037/0012-1649.44.1.5. PMID 18194000.
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  41. ^ Katz-Wise, Sabra; Hide, Janet S. (2014). "Sexual fluidity and related attitudes and beliefs among young adults with a same-gender orientation". Archives of Sexual Behavior. 44 (5): 1459–1470. doi:10.1007/s10508-014-0420-1. PMID 25378265. S2CID 21201365.
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